The main benefit is improving the efficiency by eliminating the center joint in the factory 2-piece driveshaft. Frank balances his driveshafts up to 9000 rpm so there's no wasted energy; they are dead smooth with no vibration when spinning. This becomes more and more important as you increase horsepower. That plus they are much stronger than the factory unit and can handle a lot more torque and power. It's a good upgrade.